Contractor shall replace at Tarrant County GK Maenius Administration Building the existing domestic water booster pump package with a new domestic water booster pump package as per the Drawings and Specifications prepared by Tarrant County Architect attached as Exhibit 1, herein. The Contractor shall be responsible for ALL works on the Project. A. Contractor shall perform most of the scope of work with their own hired staff. There may be, on occasion, some portion of the work that shall require the need to hire a sub-contractor to perform a portion of the work, this shall include, but not be limited to electrical work, specialty piping work, general construction work, and controls work. B. Should sub-contracting be required, the Contractor shall first obtain written approval of Tarrant County (Owner) prior to any work being performed by a sub-contractor. C. Subcontractors shall carry and maintain insurance coverages in accordance with those listed in this document.